A hole has a cover, a platform has a column, a wheel has a hood, a shaft must have the meaning of these four words
The following text is quoted:This is the language of security measuresThere are holes must have the lid,
Railings must be made along the sides of the platform,A rotating wheel with a rotating flywheel must be provided with a safety shield,
A rotating shaft with a rotating shaft must also be protected by a shaft sleeveAll of the above measures must be implemented on site, so as to avoid personal casualties caused by height difference and rotating parts
